Method and apparatus to control a step motor of an optical...

Details Method and apparatus to control a step motor of an optical... Method and apparatus to control a step motor of an optical...

2006-12-12

2006-12-12

Huber, Paul (Department: 2627)

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

C369S053290

Reexamination Certificate

active

07149157

ABSTRACT:
An apparatus to control a step motor in an optical disk driving system to move a sled which transfers a pickup unit, including a playing unit, a coarse search unit, and a driving unit. The playing unit generates a first step pulse at a first interval of time set by a disk speed according to a comparison between a sled control signal and a tracking driving signal in a playing mode with a predetermined threshold. The coarse search unit generates a second step pulse at a second interval of time stored in a table according to a number of motion steps and a motion direction corresponding to an amount of motion of the pickup unit due to operations in a search mode. The driving unit drives the step motor based on the first and second step pulses.

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patent: 10-312546 (1998-11-01), None
patent: 10-334624 (1998-12-01), None
patent: 2001-67825 (2001-03-01), None

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